4. A naturalized person may lose his nationality on account of residence abroad for a period, not less than seven consecutive years, specified by the law of the Contracting State concerned if he fails to declare to the appropriate authority his intention to retain his nationality. 5. In the case of a national of a Contracting State, born outside its territory, the law of that State may make the retention of its nationality after the expiry of one year from his attaining his majority conditional upon residence at that time in the territory of the State or registration with the appropriate authority. 6. Except in the circumstances mentioned in this article, a person shall not lose the nationality of a Contracting State, if such loss would render him stateless, notwithstanding that such loss is not expressly prohibited by any other provision of this Convention. Article 8 1. A Contracting State shall not deprive a person of his nationality if such deprivation would render him stateless. 2. Notwithstanding the provisions of paragraph 1 of this article, a person may be deprived of the nationality of a Contracting State: (a) In the circumstances in which, under paragraphs 4 and 5 of article 7, it is permissible that a person should lose his nationality; (b) Where the nationality has been obtained by misrepresentation or fraud. 3. Notwithstanding the provisions of paragraph I of this article, a Contracting State may retain the right to deprive a person of his nationality, if at the time of signature, ratification or accession it specifies its retention of such right on one or more of the following grounds, being grounds existing in its national law at that time: (a) That, inconsistently with his duty of loyalty to the Contracting State, the person: (i) Has, in disregard of an express prohibition by the Contracting State rendered or continued to render services to, or received or continued to receive emoluments from, another State, or (ii) Has conducted himself in a manner seriously prejudicial to the vital interests of the State; 82